Pressure valve



Mwclh 4, ma 1,485,828

a. w. BURKE. JR, ET AL PRESSURE VALVE Filed March 9. 1922 l atented Mar. 4, 192%.

lite

GEORGE W. BURKE, JR, AND ELLSWORTH BROWN, 6 DAYTON, OHIO.

PRESSURE VALVE.

Application filed March 9, 1922. Serial 1! 0. 542,304.

To all whom it may concern:

Be it known that we, GEORGE W. BURKE, Jr., and ELLswonTH BRowN, citizens of the United States, residing at Dayton, in the t countyof Montgomery and State of Ohio,

have invented certain new and useful Improvements in Pressure Valves, of which the following is a specification.

This invention relates to valves and while designed to hold the pressure in the tanks or reservoirs of chemical fire extinguishing apparatus, it will be apparent that the improved valve mechanism is adaptable to many other uses where a fluid-tight valve is required.

The object of the invention is to produce a valve mechanism in which the valve is held firmly against its seat with a fluid-tight pressure and yet quickly releasable from its seat.

The invention consists in the novel construction, combination and arrangement herein fully described, illustrated and claimed.

In the accompanying drawings:

Figure 1 is a view, in elevation, of the valve structure complete.

Figure 2 is an elevation taken at a right angle to Fig. 1;

Figure 3 is a longitudinal section through the valve casing, showing the valve and plunger;

Figure 4 is a plan view of the same; and

Figure 5 is a fragmentary View of the cam portion of the plunger operating lever.

In the illustrated embodiment-of the invention, the valve casing designated 10 has an inlet 11 and an outlet 12 for the fluid or liquid. A valve 13, shown in the form of a ball is movable toward and away from an internal valve seat 14 and is acted upon by a valve-seating and locking plunger 15 movable in a guideway 16 in the casing and having a beveled, rounded or pointed end 17. 18 represents a valve retaining pin or bar.

As shown, the valve casing is designed to have the inlet portion 11 fastened to a reservoir whose contents are under pressure, while the outlet portion 12 is intended to connect with a service pipe, hose, distributor or sprinkler.

Cooperating with the plunger 15 is a lever 19 which may have a handle 20 or which may be'operated from a distance by a connection 21 shown in the form of a rod attached to the lever 19 by a pivot 22.

The lever 19 is mounted in relation to the casing 10 by means of a pivot 23 normally fastened to the lever by inserting a threaded portion of the pivot through the lever and placing nuts 24 on the pivot at both sides of the lever. This provides for adjusting the pivot longitudinally of itself and laterally of the lever to advance or retard the action of the lever on the plunger 12.

Pivot 23 is externally screw-threaded as shown at 25 and engages the threaded bore 26 of an extension 27 of the valve casing 10. As the pivot 23 is turned by the lever 19, the lever is caused to move bodily toward or away from the adjacent end of the valve casing thereby acting on the plunger 15 either to force the same tightly against the valve 13 or permit the plunger to move in the opposite direction under the action of the valve as the latter is unseated by fluid pressure.

The lever 19 has a fiat face 28 which rides against the end of the plunger 15 while the threads on the pivot 23 are drawing the lever toward the valve. The lever 19 also has a cam face 29 which rides against the end of the plunger 15 in another portion of the throw of said lever. Thus the lever first operates to cam the valve to its seat with a rapid movement and subsequently acts with a powerful screw-threaded thrusting operation to jam or firmly press the valve against its seat, obtaining thereby a fluid tight closure of the passage in the valve casing.

The valve mechanism described herein is productive of a valve which will withstand high pressure without leakage, which is quick and positive in operation and which may be inspected easily without disturbing the line connections. No packing is necessary.

We claim:

1. Valve mechanism embodying, in combination, a valve casing having an internal valve seat, a valve in said casing. a plunger acting directly on said valve to force and hold the valve tightly against the valve seat, and a plunger operating lever having its pivot offset from the axis of movement of the plunger, said pivot having rigid connection with said lever and a screw-threaded engagement with a part of the valve casing.

2. Valve mechanism embodying, in combination, a valve casing having an internal valve seat, a valve in said casing, a plunger acting directly on said valve to force and hold the valve tightly against the valve seat, and a plunger operating lever having its pivot ofiset from the axis of movement of the plunger, said pivot having rigid connection With said lever and a screw-threaded engagement with a part of the valve casing, said lever having a cam face to cooperate with the plunger and also having a flat face which acts on the plunger to press the same against the valve by the draw produced by said screw-threaded engagement.

3. Valve mechanism embodying, in comhination, a valve casing having an internal valve seat, a valve in said casing, a plunger acting directly on said valve to force and a aeaeee hold the valve tightly against the valve seat, and a plunger cooperating lever having its pivot oflset from the axis of movement of the plunger, said pivot having rigid connection with said lever and a screw-threaded engagement with a part of the valve casing, and means for adjusting said pivot in relation to said lever to advance or retard the valve seating and releasing action of the lever.

In testimony whereof We affix our signatures.

GEORGE W. BURKE, JR. EEEsWoErH BROWN. 

